The invention discloses a hydraulic control valve group and a hydraulic control valve system, and belongs to the field of hydraulic valves. The hydraulic control valve group comprises a speed regulating valve, a direction valve, an overflow valve and a stop valve. The oil inlet P of the speed regulating valve communicates with an oil outlet of a hydraulic output device. A first control oil port X1of the speed regulating valve communicates with the oil inlet P of the speed regulating valve. An oil outlet T of the speed regulating valve communicates with a second control oil port X2 of the speed regulating valve. An oil inlet P of the direction valve communicates with the oil outlet T of the speed regulating valve. An oil outlet A of the direction valve communicates with an oil inlet of thestop valve. An oil outlet of the stop valve communicates with an oil return port of a speed control valve. An oil inlet of the overflow valve communicates with the oil outlet T of the speed regulating valve. An oil outlet of the overflow valve, the oil outlet T of the speed regulating valve and a T port of the direction valve all communicate with an oil tank. An oil control port of the overflow valve communicates with the oil inlet of the overflow valve. The hydraulic control valve group can be used for effectively controlling the opening degree and flow rate of the speed control valve.